To calculate the work done, you can use the formula:
\[ \text{Work} = \text{Force} \times \text{Distance} \times \cos(\theta) \]
In this case, the force is the weight of the box (50 newtons) and the distance is the height raised (0.5 meters). Since the box is raised vertically, \(\theta\) (the angle between the direction of the force and the direction of movement) is 0 degrees, and \(\cos(0) = 1\).
Thus, the work done is:
\[ \text{Work} = 50 , \text{N} \times 0.5 , \text{m} \times 1 = 25 , \text{joules} \]
So, the correct response is:
25 joules